What's the most efficient way to handle the following situation?

Here's my situation:

• I have two entity types: A and B
• Entity type B has its Position/Rotation components modified by several systems
• I want Entity type A to be assigned an entity of type B and "follow" it with some interpolation
• In the future, entity type A and B might have to belong to different worlds, so they can't just be merged into the same entity

I'm very unsure about the best way to handle this. So far I was thinking about adding a "FollowEntity" component to entity type A. FollowEntity would just contain an "Entity" to follow. Then, a "FollowEntitySystem" would go through all entities of type A, find the entity referenced by the FollowEntity component, get the Position/Rotation components on that entity, and more or less copy them to type A's position and rotation components.

The main issue is that I don't think it's possible to do a "GetComponentData<>(Entity)" from within a job. So I wouldn't be able to get the Position/Rotation of the entity to follow. Would I be forced to not do this in a job, or are there other clever ways to accomplish this?

You could imagine entity type B as a rigidbody, and entity type A as a meshRenderer that follows a rigidbody with interpolation. My rigidbodies will be in a "Simulation" world, and my renderers will be in a "Presentation" world

 

Actually you can do a "GetComponentData<>(Entity)" by "ComponentDataFromEntity<>(Entity)"